Polarization-holographic diffraction element-based real-time imaging Stokes spectropolarimetry

Determination of the characteristics of the surface of objects at optical remote sensing by the polarization-holographic imaging Stokes spectropolarimeter

“…16 The optical scheme of PHSSP is shown in Figure 2. Software has been developed for the point-by-point definition of the Stokes parameters in the images of objects, as well as it giving the possibility to obtain average values of the Stokes parameters on the images in a solid angle close to the direction of specular reflection.…”

“…As a result the element forms 3 beams in +1-st and 3 beams in -1-st orders of diffraction: two orthogonal circularly polarized beams with intensities C I + , C I − , two linearly polarized beam 45 I with an azimuth +45 0 with equal intensities and two linearly polarized beams 90 I with an azimuth +90 0 with equal intensities, and also nondiffracted beam with a state of polarization identical to incoming beam by a state of polarization. 16 The Jones vectors of diffracted orders are derived from multiplication of the Jones matrices ответственных за формирование appropriate порядка дифракции by the Jones vector of the incoming wave. As a result we have obtained the following expressions for the Jones vectors of the beams diffracted on the gratings C , 90 L and 45 L…”

A new real-time polarimetric method for determining the distribution of stressed state in different constructions

“…The all resulted intensities and the corresponding known values of the Stokes parameters have been processed using Multiple Linear Regression Fitting method and final coefficients in Eqs. (12) were calculated.…”

“…We can determine the x n , y n , Substituting in (13) the values of the intensities from (12) we shall obtain the system of equations, the solution of which enables the distribution of optical parameters (birefringence) on the surface of the object to be determined. …”

“…Such an element was created by means of polarization-holographic method 15 , when several polarization-holographic gratings with different profile of the anisotropy and gyrotropy in the band (gratings C , 90 L , 45 L ) are recorded on one and the same area of polarization-sensitive material, so that the diffracted beams have been spatially separated. [10][11][12] We use polarization-sensitive materials for recording polarization-holographic gratings and elements on their basis. In such materials under the action of polarized light a photoanisotropy and photogyrotropy of optical parameters are induced.…”